Yes, generally CS has look and feel in Windows 95 / 98 style. And under Windows XP it uses current user XP-Theme (border colors, text fonts, control sizes etc). In our opinion, on particular Windows version, application should look with current OS style much closer as it is possible. So, there should be no Vista elements under Windows 95 / 98 or vice versa.
Thank you for your response, Dean. The feel and look of the Collection Studio is important thing in any case. We can see, that there are several things to do with CollectionStudio under Vista to correspond to standards. We will keep in mind this issue when planning next versions of the CollectionStudio.